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<head>
    <meta charset="UTF-8">
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    <title>Document</title>
</head>
<body>
    <h2>首页</h2>
    <h4>欢迎您,用户:<span id="userName">xxx</span></h4>

    <script>
        // console.log(location);
        const userMsg = location.search.split('=')[1]
        userName.textContent = userMsg
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